GUILTY GEAR -STRIVE-

To obtain this achievement you have to beat Stage 9 Nagoriyuki. To reach Stage 9 in Arcade Mode you have to win every single match without lose a single round, including Stage 8 Nagoriyuki. If you reach Stage 8 successfully, you will face him alone. He has more health, more damage, Blood Gauge fills automatically and he doesn't lose life when transformed, also his DP and other moves has invincibility frames, as well as his Transformation animation. The easiest way to beat him is with chain grabs and abusing the Wall Break mechanic to deal massive damage.I recommend using either Sol, Ky or Ramlethal, but if you're confident enough you can use whenever character you like.The key to win is abusing when Nago transform and grab him in the LAST frames of the animation, then wait to him to wake up and grab him again when the animation of waking up is completely finish, the only risk is that he can make his invincible DP in any time he wakes up, making a counter and therefore huge damage. If you have 50% Tension in the corner, you can just grab him and make a super to Wall Break and deal huge damage (or make a combo to break it), then you can take advantage of the Positive Bonus state (Tension refills automatically and your damage is increase).Another strategy is pausing the game whenever he makes his dash, to know where is he going to be and grab him when hes close to you. After defeating Stage 8 Nagoriyuki without losing a round, Stage 9 Nago appears. Its the same than Stage 8, with the difference that Nagoriyuki has tree times more health, more damage and he starts transformed. The big difference is that you can begin to grab him after the transform in the beginning of the match, making chain grabs more easy, but with more risk due to his enormous life bar. Use the same strategies from Stage 8 and most important: be patient, one bad attack can cost you the match. Also, you dont need to win all rounds anymore to unlock the achievement. Good luck!